Protecting Glass during construction

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Author Message Jerome J. Lazar, RA, CCS, CSI, SCIP Senior Member Username: lazarcitec Post Number: 703 Registered: 05-2003 Posted on Friday, October 16, 2009 - 04:59 pm:    a COMMENT FROM A CLIENT ON A RECENT HIGHRISE PROJECT regarding damage to glass during construction (standard Masterspec and GANA language and publications were used and cited): "... problem is there is no standard to determine what damage to the glass is acceptable in situ; ASTM C 1036 Standard Specifications for Flat Glass establishes a standard for specifying glass but it does not address problems that happen during construction" ANY COMMENTS? ANY SUGGESTIONS? Lynn Javoroski CSI CCS LEED® AP SCIP Affiliate Senior Member Username: lynn_javoroski Post Number: 948 Registered: 07-2002 Posted on Friday, October 16, 2009 - 05:09 pm:    The basic language from MasterSpec mentions buildup of dirt, scum, alkaline deposits, or stains, glass that is broken, chipped, cracked, or abraded or that is damaged from natural causes, accidents, and vandalism, during construction period. I'm not sure that a "standard" is needed. That language seems to be pretty straight forward. Mark Gilligan SE, CSI Senior Member Username: mark_gilligan Post Number: 225 Registered: 10-2007 Posted on Friday, October 16, 2009 - 08:44 pm:    I recommend that you simply specify what you expect when the project is turned over to the Owner and that you do not get into discussions of damage during construction. Dave Metzger Senior Member Username: davemetzger Post Number: 338 Registered: 07-2001 Posted on Saturday, October 17, 2009 - 10:30 am:    What do the Conditions of the Contract state? AIA A201, 10.2.5, states in part "The Contractor shall promptly remedy damage and loss…to property…caused in whole or in part by the Contractor, a Subcontractor, a Sub-subcontractor…for which the Contractor is responsible…" John Bunzick, CCS, CCCA, LEED AP Senior Member Username: bunzick Post Number: 1122 Registered: 03-2002 Posted on Monday, October 19, 2009 - 08:47 am:    The issue is really a more general one regarding damage to any type of in place construction, since we typically don't give such standards in any section. The architect has the authority to reject work that doesn't meet contract requirements. Unfortunately, that usually is followed by serious pushback from the contractor, and could get nasty. J. Peter Jordan Senior Member Username: jpjordan Post Number: 367 Registered: 05-2004 Posted on Monday, October 19, 2009 - 10:40 am:    One of my clients recently had an issue with regard to what is "damaged" glass on a high-rise building. It sorta boiled down to how far away could you see it (like metal finishes), but could not really find any standards. Do GANA publications address this? George A. Everding, AIA, CSI, CCS, CCCA Senior Member Username: geverding Post Number: 494 Registered: 11-2004 Posted on Tuesday, October 20, 2009 - 04:58 pm:    GANA TD 03-1003 "Construction Site Protection of Architectural Glass" George A. Everding AIA CSI CCS CCCA Cannon Design - St. Louis, MO Mark Gilligan SE, CSI Senior Member Username: mark_gilligan Post Number: 228 Registered: 10-2007 Posted on Tuesday, October 20, 2009 - 05:23 pm:    Looked at GANA TD 03-1003. It emphasizes the need to protect glass and gives advice on mitigating meansures. It does not define what is acceptable. With all of the shoulds it is not clear that it is enforcable. In addition if you specify compliance with the document and the Contractor can make a claim that it complied with the provisions and the glass was still damaged the cost of repair could be on the Owner. John Bunzick, CCS, CCCA, LEED AP Senior Member Username: bunzick Post Number: 1128 Registered: 03-2002 Posted on Monday, October 26, 2009 - 05:29 pm:    ASTM C1036, the specification for flat glass, includes acceptable blemishes and defects in glass, and includes viewing conditions for blemish detection. This is for new glass, but I think you have the right to glass that was in new condition at substantial completion, meaning that blemishes would meet C1036. Of course, there is still some subjectivity in detecting blemishes, but this is where I would start.